Eriogonum apiculatum

S. Watson

Proc. Amer. Acad. Arts 17: 378. 1882.

Endemic
Treatment appears in FNA Volume 5. Treatment on page 389. Mentioned on page 383, 437.

Herbs, erect to spreading, annual, 2–9 dm, glabrous and sparsely glandular especially (or at least) near nodes, grayish to greenish. Stems: caudex absent; aerial flowering-stems erect, solid, not fistulose, 0.5–1.5 dm, glabrous, glandular distally or sparsely so throughout. Leaves basal; petiole 1–4 cm, pilose, slightly winged; blade oblanceolate to obovate, (0.5–) 1–4 × 0.5–1.5 cm, sparsely pilose, glandular and greenish on both surfaces, margins entire. Inflorescences cymose, open, 30–80 × 10–50 cm; branches not fistulose, glabrous, sparsely glandular at nodes; bracts 3, scalelike, 1–2 × 1–2 mm. Peduncles deflexed, straight, filiform, (0.1–) 0.2–0.35 cm, sparsely glandular. Involucres turbinate, 1.2–1.5 × 1–1.3 mm, glabrous; teeth 4, erect or nearly so, 0.3–0.7 mm. Flowers 1.5–2.5 mm; perianth white with reddish-brown midribs, becoming reddish in fruit, rarely yellow, puberulent; tepals monomorphic, oblong-obovate, sometimes with apiculate tip 1–2 mm; stamens exserted, 1.5–2 mm; filaments glabrous. Achenes light-brown to brown, lenticular, 1.3–1.7 (–2.2) mm, glabrous. 2n = 40.


Phenology: Flowering May–Nov.
Habitat: Sandy granitic flats and slopes, chaparral communities, oak and conifer woodlands
Elevation: (200-)700-2700 m

Discussion

Eriogonum apiculatum is restricted to the San Jacinto, Santa Rosa, Palomar, and Cuyamaca mountains of Riverside and San Diego counties. Two collections are discounted as to location: Hall 1025 (MIN), purportedly from the San Bernardino Mountains, certainly was labeled erroneously by the Parish brothers, who redistributed the sheet; and Jaeger s.n. (19 May 1940, DS, IDS, UTC, WTU) from “Falcon Flat” in the Little San Bernardino Mountains appears to be another of the small but significant list of Jaeger specimens with highly dubious label data. No such place is known in Joshua Tree National Park. The phase of the species named var. subvirgatum, with nearly sessile involucres, occurs intermixed with the typical expression.

A yellow-flowered population was found at the eastern end of the San Bernardino Mountains, San Bernardino County. Recent attempts to relocate those plants have been unsuccessful, and they remain undescribed.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.

... more about "Eriogonum apiculatum"
0.17 cm1.7 mm <br />0.0017 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
light-brown;brown +
included +  and exserted +
lenticular +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
S. Watson +
deciduous +  and persistent +
stipelike +
Eriogonum sect. Ganysma +
awn-tipped +  and simple +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
oblanceolate;obovate +
0.5cm;1.5cm +
not awn-tipped +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
scabrellous +
not fistulose +
spreading +  and erect +
whorled +, opposite +  and alternate +
(200-)700-2700 m +
unisexual +, , +  and bisexual +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
slender;stout +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
Sandy granitic flats and slopes, chaparral communities, oak and conifer woodlands +
open +  and cymose +
capitate +  and subcapitate +
racemose +, paniculate +  and cymose-paniculate +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
nonmembranous +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
reddish-brown +
not swollen +
orthotropous +
accrescent +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
erect to deflexed +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering May–Nov. +
homostylous +  and 3-carpellate +
Proc. Amer. Acad. Arts +
, +  and solid +
slender;stout +
persistent +
decumbent to erect +  and prostrate +
spreading +  and erect +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
chambered +  and solid +
Slender (?) +  and Stout (?) +
Eriogonum apiculatum +
Eriogonum subg. Ganysma +
species +
emarginate +  and entire +
1/5 +  and 1/2 +
oblong-obovate +
coriaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
nearly +  and erect +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +  and perennial +
grayish +  and greenish +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +